This calculator outputs the how fast the Dodge Viper GTS can go in each gear as calculated by the gear ratios, engine redline and tire size.
The ultimate top speed may be limted by the power, drag and aerodynamics of each individual car.

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Tire Size(345/30/20)

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OR

Tire Diameter(inches)

Final Drive Ratio

Redline (RPM)

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

500

4.78

7.14

9.78

12.71

17.18

25.42

0

0

600

5.73

8.57

11.73

15.25

20.61

30.5

0

0

700

6.69

10

13.69

17.79

24.05

35.59

0

0

800

7.65

11.42

15.64

20.34

27.48

40.67

0

0

900

8.6

12.85

17.6

22.88

30.92

45.76

0

0

1000

9.56

14.28

19.55

25.42

34.35

50.84

0

0

1100

10.51

15.71

21.51

27.96

37.79

55.93

0

0

1200

11.47

17.14

23.47

30.5

41.22

61.01

0

0

1300

12.42

18.57

25.42

33.05

44.66

66.09

0

0

1400

13.38

19.99

27.38

35.59

48.09

71.18

0

0

1500

14.33

21.42

29.33

38.13

51.53

76.26

0

0

1600

15.29

22.85

31.29

40.67

54.96

81.35

0

0

1700

16.25

24.28

33.24

43.21

58.4

86.43

0

0

1800

17.2

25.71

35.2

45.76

61.83

91.51

0

0

1900

18.16

27.13

37.15

48.3

65.27

96.6

0

0

2000

19.11

28.56

39.11

50.84

68.7

101.68

0

0

2100

20.07

29.99

41.06

53.38

72.14

106.77

0

0

2200

21.02

31.42

43.02

55.93

75.57

111.85

0

0

2300

21.98

32.85

44.97

58.47

79.01

116.93

0

0

2400

22.94

34.27

46.93

61.01

82.44

122.02

0

0

2500

23.89

35.7

48.89

63.55

85.88

127.1

0

0

2600

24.85

37.13

50.84

66.09

89.32

132.19

0

0

2700

25.8

38.56

52.8

68.64

92.75

137.27

0

0

2800

26.76

39.99

54.75

71.18

96.19

142.35

0

0

2900

27.71

41.42

56.71

73.72

99.62

147.44

0

0

3000

28.67

42.84

58.66

76.26

103.06

152.52

0

0

3100

29.63

44.27

60.62

78.8

106.49

157.61

0

0

3200

30.58

45.7

62.57

81.35

109.93

162.69

0

0

3300

31.54

47.13

64.53

83.89

113.36

167.78

0

0

3400

32.49

48.56

66.48

86.43

116.8

172.86

0

0

3500

33.45

49.98

68.44

88.97

120.23

177.94

0

0

3600

34.4

51.41

70.4

91.51

123.67

183.03

0

0

3700

35.36

52.84

72.35

94.06

127.1

188.11

0

0

3800

36.31

54.27

74.31

96.6

130.54

193.2

0

0

3900

37.27

55.7

76.26

99.14

133.97

198.28

0

0

4000

38.23

57.12

78.22

101.68

137.41

203.36

0

0

4100

39.18

58.55

80.17

104.22

140.84

208.45

0

0

4200

40.14

59.98

82.13

106.77

144.28

213.53

0

0

4300

41.09

61.41

84.08

109.31

147.71

218.62

0

0

4400

42.05

62.84

86.04

111.85

151.15

223.7

0

0

4500

43

64.27

87.99

114.39

154.58

228.78

0

0

4600

43.96

65.69

89.95

116.93

158.02

233.87

0

0

4700

44.92

67.12

91.9

119.48

161.45

238.95

0

0

4800

45.87

68.55

93.86

122.02

164.89

244.04

0

0

4900

46.83

69.98

95.82

124.56

168.32

249.12

0

0

5000

47.78

71.41

97.77

127.1

171.76

254.2

0

0

5100

48.74

72.83

99.73

129.64

175.2

259.29

0

0

5200

49.69

74.26

101.68

132.19

178.63

264.37

0

0

5300

50.65

75.69

103.64

134.73

182.07

269.46

0

0

5400

51.61

77.12

105.59

137.27

185.5

274.54

0

0

5500

52.56

78.55

107.55

139.81

188.94

279.63

0

0

5600

53.52

79.97

109.5

142.35

192.37

284.71

0

0

5700

54.47

81.4

111.46

144.9

195.81

289.79

0

0

5800

55.43

82.83

113.41

147.44

199.24

294.88

0

0

5900

56.38

84.26

115.37

149.98

202.68

299.96

0

0

6000

57.34

85.69

117.33

152.52

206.11

305.05

0

0

RPM

1st Gear

2nd Gear

3rd Gear

4th Gear

5th Gear

6th Gear

7th Gear

8th Gear

Some additional information on how these are calculated:

When D is the diameter of the tire, the car moves forward a distance πD with each revolution of the tire. If there are F revolutions per unit of time, it moves forward at a speed of πD´F per unit of time. If D is in inches and F is in revolutions per minute (rpm), the above result will be in inches per minute. There are 63,360 inches in a mile and 60 minutes in an hour, so one inch per minute equals 60/63360 miles per hour or 1/1056 mph. So we have the following formula:

V(mph) = D(in) ´ F(rpm) ´ (π/1056)

In the automotive industry, the coefficient 1056/π is usually taken to be equal to 336 (exactly it is 336.1352398...) and the formula corresponding to the above is:

(mph)(gear ratio)(336) = (tire diameter in inches)(rpm)

With the above numerical approximation, both formulas are identical if we consider that (rpm)/(gear ratio) is the rate of rotation of the tires. So the "gear ratio" as the number of rotations of the driveshaft for each turn of the tire. This ratio is normally more than 1, except in overdrive gear. So, calling R the "gear ratio", your final answer is:

V(mph) = D(in) ´ F(rpm) ´ (π/1056) / R

or, approximately: V = (D ´ F) / (336 ´ R)

where V is the velocity (in mph), D the tire diameter (in inches), F the engine rpm, and R the gear ratio.